yes curtain ones are easy. let me state my experience..
once i was sitting outside one of Mango boutiques' changing room
waiting area, it has this big curtain to cover the entrance but
sales girls were busily walking in & out so the big curtain was
only covering half of the entrance all the time. There are big
mirrors outside the changing compartments so i could directly see
the mirror reflection of girls changing.. i guess they thought
since the entrance was already covered so didnt close the
individual compartment door fully.. and nowadays girls like to put
on just nipple tapes huh after the bra burning issue? oh i think i
should just leave the rest of the details of wat i've seen to your
imagination.. nearly nose bleed.